High-performance liquid chromatographic enantiomer separation and determination of absolute configurations of phosphinic acid analogues of dipeptides and their α-aminophosphinic acid precursors
The enantiomers of N-benzyloxycarbonyl-phospinic pseudodipeptides and their N-benzyloxycarbonyl-alpha-aminophosphinic acid precursors as well as various other structural analogues were separated oil a set of cinchona alkaloid-derived chiral anion-exchangers by HPLC in the reversed-phase mode. Semi-preparative scale chromatography provided single enantiomers in 100 mg quantities. The configurations of the enantiomers were assigned indirectly by enantioselective chromatography on the basis of the elution order and was confirmed by enantiomeric reference compounds. (C) 2003 Elsevier Ltd. All rights reserved.